SB2026062974 - Memory corruption in Linux kernel early kernel mapping
Published: June 29, 2026
Security Bulletin ID
SB2026062974
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory corruption (CVE-ID: CVE-2026-53288)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper memory mapping in early kernel mapping when initializing arm64 kernel segment page tables. A local user can trigger the vulnerable boot-time mapping condition to cause a denial of service.
The issue affects arm64 systems using 4K pages during early boot.
Remediation
Install update from vendor's website.